/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
  }
  
  body {
    font-family: Arial, sans-serif;
  }
  
  #header {
    text-align: center;
    padding: 20px;
    background-color: #f4f4f4;
  }
  
  #header img {
    max-width: 100%;
  }
  
  #header h4 {
    display: inline-block;
    margin-left: 10px;
  }
  
  #content {
    display: flex;
    padding: 20px;
  }
  
  #left {
    width: 20%;
  }
  
  #left ul {
    list-style-type: none;
  }
  
  #left li {
    padding: 5px;
  }
  
  #right {
    width: 80%;
    text-align: center;
  }
  
  #footer {
    text-align: center;
    padding: 20px;
    background-color: #f4f4f4;
  }